CHARACTERISTICS OF URINARY STONE COMPOSITION

Abstract

The article discusses the results of the study of the mineral composition of urinary stones obtained as a result of self-expulsion, as well as the use of minimally invasive surgical techniques in 124 patients with urolithiasis. There was a mixed composition of the stone in most patients - 106 (74.2%), consisting of two or more mineral components. Depending on the predominant component, the volume fraction of which was more than 50% of the sample, urinary stones were classified into 3 mineral types: type 1 -oxalate-calcium concrements, the dominant component of which is calcium oxalate in the form of monohydrate (vevelite) or dihydrate (vedelite); type 2 -phosphate-calcium, in which more than 50% of the volume is represented by apatite, hydroxylapatite or fluorapatite; type 3 -stones, the dominant substance of which is uric acid or uric acid dihydrate. Most urinary stone samples were represented by concrements of type 1, which was significantly more common in male patients. No gender dependence in the prevalence of stones of types 2 and 3 was found. Type 1 urinary stones were observed in all age categories, with a predominance in patients aged 30-39 years (41.38%). The age distribution of type 2 stones had similar characteristics, with the maximum number of patients with this type of stone being in the age range of 40-49 years (33.3%), with a further decrease in this indicator in older age groups. The minimum number of cases of type 3 stone formation was registered among patients aged 30-39 years (5.88%). In the following age periods, the quantitative presence of this type of stone increased with a maximum value in the age range of 50-59 years (52.94%).